#include "wdtx_adc.h"

uint16_t sampleValue = 0;

uint16_t Adc_GetSampleValue(void)
{
	return sampleValue;
}

void Adc_Init(void)
{ 	
	ADC_InitTypeDef ADC_InitStructure; 
	GPIO_InitTypeDef GPIO_InitStructure;
	NVIC_InitTypeDef NVIC_InitStructure;

	RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA |RCC_APB2Periph_ADC1, ENABLE );	 

	RCC_ADCCLKConfig(RCC_PCLK2_Div8);   
                      
	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1;
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;		
	GPIO_Init(GPIOA, &GPIO_InitStructure);	

	ADC_DeInit(ADC1); 

	ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;	
	ADC_InitStructure.ADC_ScanConvMode = DISABLE;	
	ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;	
	ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;
	ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;	
	ADC_InitStructure.ADC_NbrOfChannel = 1;	
	ADC_Init(ADC1, &ADC_InitStructure);	

	ADC_RegularChannelConfig(ADC1, ADC_Channel_1, 1, ADC_SampleTime_239Cycles5 );
  
	ADC_Cmd(ADC1, ENABLE);	
	
	ADC_ResetCalibration(ADC1);	
	while(ADC_GetResetCalibrationStatus(ADC1));	
	ADC_StartCalibration(ADC1);	 
	while(ADC_GetCalibrationStatus(ADC1));	
	
	NVIC_InitStructure.NVIC_IRQChannel = ADC1_2_IRQn;
	NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2; 
	NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
	NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; 
	NVIC_Init(&NVIC_InitStructure); 

	ADC_ITConfig(ADC1,ADC_IT_EOC,ENABLE);
 
	ADC_SoftwareStartConvCmd(ADC1, ENABLE);		
}

void ADC1_2_IRQHandler(void)
{
	sampleValue = ADC_GetConversionValue(ADC1);
	ADC_ClearITPendingBit(ADC1,ADC_IT_EOC);
}


